Adding Elements

Part of the Fundamentals section of Coddy's Dart journey — lesson 52 of 94.

The add() method lets you add new elements to the end of a list. This is how you expand a list after creating it.

Create a list of fruits:

List<String> fruits = ['Apple', 'Banana'];
print(fruits);

Add a new fruit to the list:

fruits.add('Orange');
print(fruits);

After executing the above code, the output will be:

[Apple, Banana]
[Apple, Banana, Orange]

Challenge

Beginner

In this challenge, you'll practice adding elements to a list using the add method.

The code already has a list of favorite colors with three colors. Your task is to add a fourth color, 'Purple', to the list using the add method.

After adding the color, the program will print the updated list, which should look like this:

[Red, Blue, Green, Purple]

Cheat sheet

The add() method adds new elements to the end of a list:

List<String> fruits = ['Apple', 'Banana'];
fruits.add('Orange');
print(fruits); // [Apple, Banana, Orange]

Try it yourself

void main() {
  // List of favorite colors
  List<String> favoriteColors = ['Red', 'Blue', 'Green'];
  
  // TODO: Add 'Purple' to the favoriteColors list using the add method
  
  // Print the updated list
  print(favoriteColors);
}

Test yourself

This lesson includes a short quiz. Start the lesson to answer it and track your progress.

All lessons in Fundamentals

1Introduction to Dart

What is Dart?The main Function Printing Output Code Comments

4Operators Part 2

Comparison Operators Logical AND Logical OR Logical NOT Type Test Operators Recap - Making Comparisons

7Working with Strings

String Concatenation String Interpolation Multi-line Strings String Properties Basic String Methods

10Collections - Maps Basics

What are Maps?Creating a Map Accessing Values by Key Key-Value Pairs Getting Map Size Getting Keys Getting Values Checking if a Key Exists

13Null Safety In Depth

Understanding Null Nullable Types Non-Nullable Types Null Assertion Operator Late Initialization Recap - Handling Null Safely

16Fundamentals Challenges

Challenge: List of calculation Challenge: Sum of numbers Challenge: Find product

3Operators Part 1

Arithmetic Operators Integer Division Modulo Operator Increment and Decrement Assignment Shortcuts Recap - Simple Calculations

6Control Flow - Decision Making

The 'if' Statement The 'else' Statement The 'else if' Statement Recap - Simple Decisions Nested 'if' Statements The 'switch' Statement

9Collections - Lists Basics

What are Lists?Creating a List Accessing by Index Getting List LengthAdding ElementsRemoving Elements Checking if a List is Empty Iterating Over a List

12Functions Advanced

Optional Positional Parameters Named Parameters Required Named Parameters Default Parameter Values Recap - Function Parameters

15Project: Simple Calculator

Setting Up Declaring Number

Creating an Operation

Performing Calculation

Displaying Result